GNU bug report logs - #57516
Fontification of single brace in an optional argument

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Message #5 received at submit <at> debbugs.gnu.org (full text, mbox):

From: Arash Esbati <arash <at> gnu.org>
To: auctex-bugs <bug-auctex <at> gnu.org>
Subject: Fontification of single brace in an optional argument
Date: Thu, 01 Sep 2022 11:31:25 +0200

[Message part 1 (text/plain, inline)]

Hi all,

please consider this artificial but valid LaTeX code:

--8<---------------cut here---------------start------------->8---
\documentclass{article}

\usepackage{siunitx}

\begin{document}

\numlist[list-separator={[ }]{0.1;0.2;0.3}

Some text here

\numlist[list-separator={] }]{0.1;0.2;0.3}

\numlist[list-separator={; }]{0.1;0.2;0.3}

\end{document}

%%% Local Variables:
%%% mode: latex
%%% TeX-master: t
%%% End:
--8<---------------cut here---------------end--------------->8---

which looks like this with emacs -Q and vanilla AUCTeX:

[font-latex.png (image/png, inline)]

[Message part 3 (text/plain, inline)]

Note how the first {[ } extends the fontification until the next {] }.
I think the issue is in the function `font-latex-find-matching-close',
but I don't have an idea how to fix this.  Any takers?

Best, Arash

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